A replaceable friction roller is mounted on the driving shaft of a paper conveying roller. The roller is made replaceable by providing a slit from the surface of the roller to the shaft surface. The roller can be split open along the cur when replacing a new roller. The ends of the shaft of the roller are inserted in at least one open mouth socket. The socket has spring action to hold the shaft in place.
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1. A paper conveying mechanism for a printer, comprising:
a back plate; a friction roller for conveying a piece of paper; a shaft for mounting said friction roller; an attachment for attaching said shaft to said back plate; and a cut from the outer surface of said roller to the inner surface wrapping around the shaft so that the roller can be split along the cut for removal from said shaft, wherein said cut comprises a straight slit near the surface of the roller and a dovetailed cut near the surface of the shaft.
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This application is a division of application Ser. No. 09/766,998, filed Jun. 23, 2001, now issued as U.S. Pat. No. 6,488,276, Dec. 3, 2002.
(1) Field of the Invention
This invention relates to a printer, particularly to he conveying roller of the printer.
(2) Brief Description of Related Art
Prior art has been using a roller to convey paper in a printer, as shown in
Due to high speed operation of modem printers, the roller 16 experiences wear and tear. The life of the printer is thus adversely affected.
An object of this invention is to increase the useful life of a printer. Another object is to reduce servicing coast of a printer.
These object is achieved by using a replaceable roller for a printer. A replaceable friction roller is mounted on the driving shaft of a paper conveying roller. The roller is made replaceable by providing a slit from the surface of the roller to the shaft surface. The roller can be split open along the cut when replacing a new roller. The ends of the shaft of the roller are inserted in at least one open mouth socket. The socket has spring action to hold the shaft in place.
While the preferred embodiments of the invention have been described, it will be apparent to those skilled in the art that various modifications may be made in the embodiments without departing from the spirit of the present invention. Such modifications are all within the scope of this invention.
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Patent | Priority | Assignee | Title |
4473221, | Sep 30 1980 | WHITEMAN INDUSTRIES, INC , A IDAHO CORP | Paper feeding roller |
4729557, | Nov 19 1984 | Canon Kabushiki Kaisha | Sheet feed device |
5421569, | Oct 12 1994 | Xerox Corporation | Replaceable feed/retard roll unit |
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Jan 15 2003 | SHENG, THOMAS | Avision Inc | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 013733 | /0414 | |
Jan 15 2003 | LIEN, SZU-HUI | Avision Inc | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 013733 | /0414 | |
Feb 05 2003 | Avision, Inc. | (assignment on the face of the patent) | / |
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